I opened up the two small access panels on my 1961 Tradewind. The door side is the towing electrical hook up - okay to figure out. But the curb side was not. I know it is the 12v system, but cannot make any sense of this. The two battery cables on the outside are completely rotted and there is evidence of PO messing around. Anyone know how many circuits, what wire might be for what, etc.? I am adding a converter in the bedroom and moving the house battery to the rear, so just need to know what to hook into. That big bare wire (ground???) is just scary looking. At least it is 12v, so can't kill myself with it! I really wish there was a wiring diagram for this trailer.